The north London side has the services of Harry Kane and Vincent Janssen as the two recognised strikers at the club. The Dutch international moved to White Hart Lane last summer and has struggled to impress in his debut season.

Janssen managed to score only two goals in the Premier League, while Kane was the league's top scorer with 29 goals. Fowler claims he has heard that King, who has scored 16 goals for Bournemouth, is wanted by Mauricio Pochettino after claiming that Janssen is "not good enough" for Tottenham.

"The Dutch lad Vincent Janssen does not look ­Tottenham class. I am not slagging him, just being realistic – he is not good enough to replace Harry Kane," Fowler told the Mirror.

"Spurs got lucky last season because Kane only had one injury spell and they did not miss him too much. But if he gets a bad one or struggles, they will need better quality as back-up.

"They will go and spend. There will be a striker coming in – I've heard ­Bournemouth's Josh King is possible – and despite the fact there have been a few misfires in recent years, they have been building a good quality squad."

Apart from Tottenham, the other teams which finished the last season in top six have already completed at least two signings so far this summer. These clubs are still in the market to further strengthen their squad.

Pochettinho sanctioned Kyle Walker's sale to Manchester City as the England international became the world's most expensive defender. Fowler has issued a warning to Tottenham that failure to bring in new faces in the ongoing window could see the club go "backwards".

"...other teams will be stronger as well. City have spent the best part of £200m already, Chelsea will strengthen massively and United have spent £150m so far, with no sign of stopping," the ex-England international striker explained.

"Arsenal have made a couple of decent-looking buys, too, Liverpool no doubt will and Everton are pushing with their ­impressive summer so far. So, if Spurs stay still in the transfer market, it could see them go backwards rapidly.

"That's the wonderful world of the Premier League these days – you may need to spend £200m to stay still. I don't think I would be too worried yet, if I were a Spurs fan – Pochettino seems to have a plan. It will be ­fascinating to see whether it comes off."